3.the stethoscope transmits and amplifies sounds from localized areas of the body, theus making them(as easy as) to hear and identify
why D " easier" is not correct? should be more easy??
4.uncertainty diffres from risk in that (there is no) basis for estimating the probability of each potential condition occurring..
why D (it is not) incorrect? should be it is not the basis?
Thank you very much.
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3.答案选D
4.我同意你的改法!it is not the basis。
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